greyireland / greyireland/algorithm-pattern
勘误-算法快速入门-示例 2:subsets
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Description
算法写错了,
* 首先subsets()中调用backtrack()的次数少了.这是出错的根本原因;
* 另外,backtrack()里面没有写退出递归的if条件;
导致得出的子集数量比正确答案的少.
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